.content {
  width: 1200px;
  margin: 10px auto 40px;
  overflow: hidden;
}
.content > div:nth-of-type(1) {
  float: left;
  width: 180px;
}
.content > div:nth-of-type(1) a {
  display: block;
  width: 180px;
  height: 45px;
  background-color: #ffffff;
  border-radius: 5px;
  text-align: center;
  line-height: 45px;
  margin-bottom: 10px;
  position: relative;
}
.content > div:nth-of-type(1) a span {
  position: absolute;
  left: 0;
  display: block;
  height: 100%;
  width: 0px;
  border-radius: 5px 0 0 5px;
  transition: width .5s;
  -moz-transition: width .5s;
  /* Firefox 4 */
  -webkit-transition: width .5s;
  /* Safari and Chrome */
  -o-transition: width .5s;
  /* Opera */
}
.content > div:nth-of-type(1) a:hover span {
  width: 10px;
  background: #f83030;
}
.content > div:nth-of-type(1) .zhong span {
  width: 10px;
  background: #f83030;
}
.content > div:nth-of-type(2) {
  float: right;
  width: 1010px;
  height: 890px;
  background-color: #ffffff;
  border-radius: 5px;
}
.content > div:nth-of-type(2) > div {
  width: 990px;
  margin: 0 auto;
}
.content > div:nth-of-type(2) > div > p {
  padding-left: 15px;
  height: 60px;
  line-height: 60px;
  border-bottom: 1px solid #ececec;
}
